Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - First Lien Mortgage Securitizations (Details)

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Securitizations and Other Variable Interest Entities - First Lien Mortgage Securitizations (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Residential Mortgage - Agency          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Proceeds from loan sales $ 2,206,000,000 $ 1,496,000,000 $ 3,302,000,000 $ 3,151,000,000  
Gains on securitizations 8,000,000 23,000,000 15,000,000 41,000,000  
Repurchases from securitization trusts 242,000,000 357,000,000 486,000,000 858,000,000  
Gain (loss) on loans securitized 11,000,000 21,000,000 19,000,000 45,000,000  
Deconsolidation of securitizations 430,000,000 0 1,100,000,000 0  
Commercial Mortgage          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Proceeds from loan sales 2,194,000,000 1,741,000,000 3,181,000,000 2,279,000,000  
Gains on securitizations 28,000,000 21,000,000 45,000,000 39,000,000  
Repurchases from securitization trusts 0 0 0    
First Lien Mortgages          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Mortgage loans serviced for investors 210,500,000,000 249,500,000,000 210,500,000,000 249,500,000,000  
Servicing fees 144,000,000 $ 181,000,000 292,000,000 $ 378,000,000  
Transfers continuing involvement servicing fee advances $ 2,800,000,000   $ 2,800,000,000   $ 3,300,000,000